The Schneider Electric MGN61848 is a Multi9 C60H-DC miniature circuit breaker — a 2-pole, 10 A rated, C-curve unit built specifically for DC circuits.
This breaker's interrupting capacity changes with system voltage, and that's the first thing to check when you're laying out a DC distribution board. At 220 V DC it's rated 20 kA Icu; at 250 V DC it holds at 20 kA. Step up to 440 V DC and it drops to 10 kA; at 500 V DC it's 6 kA. The rated insulation voltage (Ui) is 500 V DC, and the rated operational voltages (Ue) cover 220 V DC, 250 V DC, 440 V DC, and 500 V DC. That 500 V DC Ui means the internal clearances are sized for that ceiling, but the interrupting rating at 500 V is only 6 kA — the breaker can sit on a 500 V rail, but it can't interrupt a high-energy fault there.
Thermal-magnetic trip and C-curve behaviour
It's a thermal-magnetic trip with a C-curve. The magnetic trip threshold is 8.5 x In ±20% DC — so for this 10 A unit, the magnetic pickup sits between roughly 68 A and 102 A DC. That's a fairly tight window compared to some DC-rated breakers, which matters if you're protecting a load with a moderate inrush. The thermal element handles sustained overloads; the magnetic element clears short-circuits fast.
Mounting and wiring details for the panel builder
Clip-on mounting on a standard DIN rail. It occupies 4 x 9 mm pitches — so 36 mm wide — which is a standard 2-module width for a 2-pole breaker. It can take up to three 1 mm² conductors in one terminal if you're daisy-chaining.